# Vertical Multiplication Steps
#### Decimal Multiplication
```rust
BigInt::from(12), &BigInt::from(345), 10)
```
```js
12
× 345
--------
= 60
+ 48.
+ 36..
--------
= 4140
```
#### Hexadecimal Multiplication
```rust
BigInt::from(12), &BigInt::from(345), 16)
```
```js
c
× 159
-------
= 6c
+ 3c.
+ c..
-------
= 102c
````
#### Binary Multiplication
```rust
BigInt::from(12), &BigInt::from(345), 2)
```
```js
1100
× 101011001
----------------
= 1100
+ 0.
+ 0..
+ 1100...
+ 1100....
+ 0.....
+ 1100......
+ 0.......
+ 1100........
----------------
= 1000000101100
```